Having had the pro and eco kits, yes they are good, but the fundamental issue is the poor quick release bracket, this is the weak point sadly, as any bumps dislodges the connection sometimes and stop working. The often loss of power for no reason is also frustrating. I have done many commutes to work and i would say 90% no issues, but when it does play it, useless for no reason at all. I have a 26mile round commute and have to carry both batteries as not confident in the pro achieving the trip, caught out a couple of times. I think for future i would buy a dedicated e-bike that has been designed to just work. Novel idea though.